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tsumego #33
Posted: Thu Dec 06, 2012 5:34 pm
by cyclops
Day #33 December 7th
#33a Advanced problem
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#33b Intermediate problem
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#33c Elementary problem
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Pls check #32 thread to see some five years old quotes about #32a. Seems something rotten in the state of tsumego.
Re: tsumego #33
Posted: Fri Dec 07, 2012 1:20 am
by schawipp
I give it a try:
#33c Elementary problem
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and then ...
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This leads to "bent four in the corner"
Edit: This is even "more" dead due to shortage of liberties
#33b Intermediate problem
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etc... in all variations, w is unconditionally dead
#33a Advanced problem
With this problem, I'm not really sure. First, it seems clear that there is only one eye around the G19 area. Thus, b has to make a second eye elsewhere, which is only possible in upper left corner. A possible start would be
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(5 is only move for b). After this I can not see how w could prevent a second eye, but maybe I'm missing another important variation.
Re: tsumego #33
Posted: Fri Dec 07, 2012 1:23 am
by Unusedname
#33a
the best i could get was ko
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i can assume that white has to block else black gets free right?
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and now black needs another ko threat
alternatively
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again black needs a ko threat.
#33b
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i think just 1 is enough
a and b miai
#33c
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Re: tsumego #33
Posted: Fri Dec 07, 2012 1:32 am
by TIM82
First time posting, hope I did not mess the markup.
#33a Advanced problem
In my reading, if 1, after 2 no mattew how B answers, a kills.
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If 1, after 2 and 3, there is ko (b can get an eye by playing a if w connects at b)
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If ko is not an option due to threats, B could perhas sacrifice right side? After 3, 4 seems forced, and then 5 looks like it lives or runs?
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what did I miss, or misread?
Re: tsumego #33
Posted: Fri Dec 07, 2012 1:40 am
by Unusedname
TIM82 wrote: First time posting, hope I did not mess the markup.
#33a Advanced problem
If ko is not an option due to threats, B could perhas sacrifice right side? After 3, 4 seems forced, and then 5 looks like it lives or runs?
$$Bc
Click Here To Show Diagram Code [go]$$Bc
what did I miss, or misread?
I think white can kill without letting black escape by playing here
$$Bc
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Re: tsumego #33
Posted: Fri Dec 07, 2012 4:41 am
by schawipp
Unusedname wrote: #33a
#33b
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i think just 1 is enough
a and b miai
I think, this does not work:
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If white answers this way, then a and b are miai for life.
Re: tsumego #33
Posted: Fri Dec 07, 2012 4:44 am
by SoDesuNe
schawipp wrote: Unusedname wrote: #33a
#33b
$$Bc
Click Here To Show Diagram Code [go]$$Bc
i think just 1 is enough
a and b miai
I think, this does not work:
$$Bc
Click Here To Show Diagram Code [go]$$Bc
If white answers this way, then a and b are miai for life.
Correct. That's why:
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I guess, Black plays
, making 'a' and 'b' Miai.
, making 'a' and 'b' Miai.